Ventilating cowl



Nov. 10, 1936.

E. D. LENKE VENTILATING COWL Filed April 22, 1955 hi hdvlllh in INVENTOR 'afm/mm.'

ATTORNEY Patented Nov. 10, 1936 UNITED STATES PATENT OFFICE 6 Claims.

This invention relates to improvements in gas burning cooking stoves and particularly to an improved cowl for such stoves.

Objects of the invention are to provide a cooking stove having a cowl of simple, durable construction which may be conveniently operated and which will be very efficient in removing fumes and vapors formed by the operation of the stove.

Other objects are to provide a cowl which may be quickly and conveniently attached to a stove or to a wall above a stove and which is provided with an electrically operated exhaust fan arranged therein to draw the g-ases of combustion and coo-king fumes from the stove and expel the same from the room in which the stove is located.

Additional objects are to provide a cowl of the class above indicated which may be attached to or used in connection with practically any type of stove and which is provided with adjustable means for operative attachment to stoves having any type of oven vent; to provide a cowl having a forwardly presented inlet opening arranged to receive the gases of combustion and vapor formed by the cooking operation and to provide improved means for drawing the fumes and vapor from the vicinity of the stove and expelling the same through a chimney or other ue.

The rabove objects are accomplished and additional ends are attained by the novel construction, combination and arrangement of parts herein described with reference to the accompanying drawing wherein there is shown an illustrative embodiment of the invention, it being understood that the invention is not confined to the exact form shown and that changes and modifications may be made or resort had to substitutions which come within the spirit of the invention as set forth in the claims hereunto appended.

In the drawing:-

Figure 1 is a front, elevational View of a stove equipped with a Ventilating cowl constructed in accordance with this invention,

Figure 2 is a side elevational View of same,

Figure 3 is a vertical, sectional view taken as `indicated by the lines 3-3 of Figure 2,

Figure 4 is a vertical, sectional view taken as indicated by the lines 4-4 of Figure 1.

Proceeding now to a detailed description of the invention with reference tothe particular adaptation thereof disclosed in the drawing, the numeralV 5 is used generally to denote a stove which may be of any suitable construction and which is provided on the upper face thereof with a plurality of gas burners 6. The stove 5 is provided with a suitable oven having the usual exhaust pipe I. In the particular adaptation of the invention shown, the upper portion of the stove is provided with a back plate 8 on which is mounted the improved cowl 9. 5

The cowl 9 is provided with a horizontally disposed, rectangular base plate I0. The forward edge portion thereof is supported on the back plate 8 with the base plate I0 projecting rearwardly therefrom. The numeral II denotes a l0 rear wall, preferably of rectangular form, which projects upwardly from the rear edge of the plate I0 and the numerals I2 and I3 denote side walls which project forwardly therefrom. The side walls I2 and I3 may be of any suitable design. l5 As shown in the drawing, each side wall I2 or I3 is of the same Width as the adjacent side of the base plate I0 and extend upwardly with the forward edge thereof curved inwardly, then outwardly to form a relatively wide upper portion which is of approximately twice'the width of the lower portion thereof.

The upper portion of each side wall I2 and I3 terminates in a forwardly projecting point I4 and presents an edge I5 which is inclined upwardly "25 and outwardly from said curved edge to the point I4 and an edge I6 which is inclined rearwardly and upwardly from said point I4. The upper edge of the side plates I2 and I3 are disposed in the same horizontal plane as the upper edge of the rear wall I I.

The numeral I'I denotes a relatively narrow, forward wall which extends between the edges I6 of the side walls I2 and I3 with the upper edge thereof terminating in the horizontal plane of the upper edges of the walls II, I2 and I3. The numeral I8 denotes a bottom wall which extends between the side walls I2 and I3. The wall I8 is provided with a rear portion I8a which projects forwardly at an upward inclination from 40 the rear wall II along a line intermediate its height and a forward portion I8b which is arched upwardly in the form of a portion of a 'hollow cylinder with the forward edge thereof terminating at the lower ends of the edges I5. The forward portion I8b of the wall I8 provides a laterally disposed, downwardly presented cavity I9 which forms a cowl for the light 20 hereinafter described.

The numeral 2| denotes a casing preferably l50 composed of sheet metal. rIhe .lower end of the casing 2I is of rectangular shape and is adapted to receive the upper end of the walls I I, I2 and I3 which are suitably secured thereto. In the adaptation of the invention shown in Figure 4, '55

the forward wall of the casing 2| extends downwardly and forwardly to form the strip I'I. The wall of the casing 2| converges upwardly from the rectangular lower end portion thereof to a relatively smaller round upper end portion which terminates in a cylindrical pipe 22.

The rear wall I I is provided with a rectangular opening in which is tted a door 23 which is hingedly secured along its upper edge to the wall II. The door 23 is provided along each lateral side thereof with inwardly projecting sector shaped side walls which are suitably secured thereto with the apex of the sector shaped wall presented upwardly. The side walls are connected along the bottom edges thereof with an arcuate lower wall 25. The arcuate, lower wall 25 is provided with a circular opening 23 and the door 28 may be swung outwardly as shown by the dotted lines in Figure 4 to position the arcuate wall 25 outside of the wall II for the' purpose of mounting a vent pipe 30 in the opening 25.

The portion I8a of the wall I8 is provided with a circular opening 29 which is adapted to receive the upper end of the pipe 3D which leads from the oven of the stove as hereinafter disclosed.

It will be seen that the side walls II, I2 and I3 and the bottom wall I8 and the casing 2i completely enclose a cavity 2Ia except at the forward side thereof which is provided with a downwardly presented rectangular opening 3|. A bracket 32 is welded or otherwise secured to the upper side of the wall I8b with the end portions 33 and 34 projecting upwardly from each end thereof. A ring 35 is suitably secured to the projecting end portions 33 and 34. A collar 36 is concentrically supported within the ring 38 by the radially arranged springs 3'! and an electric motor 38 is suitably secured in the collar 36. The motor shaft 39 projects upwardly from said motor and is provided on the upwardly projecting end thereof with a suitable fan 4U, which is operable to force air upwardly into the flue 22.

'Ihe numeral 4I denotes a `cylindrical sleeve which is positioned around the fan 40 and which extends upwardly therefrom to the walls of the casing 2I. Suitable conductor wires 42 are employed to operatively connect the motor 3B and the lamp 20 in an electric circuit. A switch 43 being provided for the motor and a switch 44 for the lamp 2U.

The cowl 9 is mounted to position the cowl above the stove, with the elongated opening 3l disposed with its outer edge thereof in a longitudinal line extending from the lower end of the interior face of the flue 22 to a line extending forwardly of the burners 5 as indicated by the dotted line 45 on Figure 2. The sleeve 4I prevents air driven upwardly by the fan 40 from returning to the cavity of the casing whereby all gases and vapors are efficiently driven upwardly through the iiue 22.

While the improved Ventilating device has been illustrated and described in reference to a particular stove 5, it is understood that the same. is adapted for use with any type of stove and that the cowl 9 may be manufactured as a separate unit and mounted in any suitable manner above a stove or other heating device.

Having thus illustrated my invention and described the same in detail, what I claim as new and desire to secure by Letters Patent iszl. In a device of the character described, a casing having a rectangular lower portion, an upper portion converging upwardly from said rectangular portion and terminating in a cylindrical flue, a bottom wall in said lower portion, said bottom wall inclined upwardly from the rear wall thereof and terminating in spaced relation to the forward wall thereof to provide a downwardly presented, elongated opening extending along the forward side of the casing, means to connect an open vent pipe to communicate with the interior of said casing, an electric motor mounted within said casing with the shaft thereof projecting upwardly, a fan mounted on the upwardly projecting end of said shaft and a cylindrical sheath having its upper end attached to the wall of said upper portion with the lower end thereof in communication with said casing and the upper end thereof in communication with said flue, said sheath projecting downwardly with the lower end thereof surrounding said fan.

2. In a device of the character described, a casing having a rectangular lower portion, an upper portion converging upwardly from said rectangular portion and terminating in a cylindrical flue, a bottom wall in said lower portion, said bottom wall inclined upwardly from the rear wall thereof with the forward portion thereof bulged upwardly to form a transversely arranged recess in the lower side thereof, said bottom wall terminating in spaced relation to the forward wall of the casing to provide a downwardly presented, elongated opening extending along the forward side of the casing, means to connect an oven vent pipe in communication with the interior of said casing, an electric motor within said casing, said motor mounted on the upwardly bulged portion of said lower wall with the shaft thereof projecting upwardly, a fan mounted on the upwardly projecting end of said shaft and a cylindrical sheath positioned entirely within said casing with the upper end thereof communicating with said flue and the lower end thereof with the interior of said casing, said sheath having its upper end attached to the wall of said upper portion, said sheath projecting downwardly with the lower end thereof surrounding said fan.

3. In a Ventilating hood for a cooking stove having gas burners on the upper side thereof and an oven, a support adapted to project upwardly from the rear edge of said stove, a casing mounted on said support, said casing having a rectangular lower portion, an upper portion converging upwardly from said rectangular portion and terminating in a cylindrical flue, a bottom wall in said lower portion, said bottom wall inclined upwardly from the rear wall thereof and terminating in spaced relation to the forward wall of said casing to provide a downwardly presented opening which extends along the forward side of the casing, a vent pipe adapted to lead from an oven and communicating with the interior of said casing at a point below said opening, an electric motor mounted within said casing with the shaft thereof projecting upwardly, a fan mounted on the upwardly projecting end of said shaft and a cylindrical sheath having its upper end attached to the wall of said upper portion so as to communicate with said flue, said sheath projecting downwardly with the lower end thereof terminating within said cavity surrounding said fan.

4. In a device of the character described, a casing, having a rectangular lower portion, a top portion having a side wall which converges from said lower portion to a cylindrical ue which projects upwardly from the upper end thereof, a bottom wall in said lower portion, said bottom wall inclined upwardly from the rear wall thereof with the forward edge thereof terminating in spaced relation to the forward wall of said lower portion leaving a space forming a downwardly presented inlet opening to the interior of said casing, an oven vent pipe operatively attached to the lower portion of said casing and communicating with the interior thereof at a point below said inlet opening; an electrically driven fan mounted within said casing, said fan operable to force air upwardly into said flue and a cylindrical sheath closely fitted to and attached tothe wall of said upper portion with the upper end thereof presented to said flue, said sheath projecting downwardly with the lower end thereof terminating within said casing and surrounding said fan.

5. In a Ventilating device for a gas burning kitchen stove, a casing having a rectangular lower portion, an upper portion converging upwardly from said rectangular portion and terminating in a flue; a bottom wall in said lower portion, the rear wall of said lower portion projecting downwardly beyond said bottom wall, said lower portion having a relatively short forward wall inclined outwardly from the lower edge of said upper portion, said bottom wall inclined upwardly from the rear wall thereof and terminating in spaced relation to the forward wall thereof to provide a downwardly presented, elongated open.. ing extending along the forward side of the casing; the forward portion of said bottom wall provided with a laterally extending, upwardly bulged portion forming a light cowl on the lower side thereof; a bracket secured to the upper face of said upwardly bulged portion; an electrically driven fan operatively mounted on said bracket; a cylindrical sheath having its upper end closely tted to and attached to the wall of said upper portion so as to be in communication with said flue, said sheath projecting downwardly with the lower end thereof terminating within said upper portion and surrounding said fan and means to operatively connect an oven vent pipe to communicate with the lower, rear portion of the interior of said casing.

6. A Ventilating apparatus for drawing fumes from a kitchen stove, comprising a casing having walls which converge upwardly to a ue at the top thereof; means to support said casing over a stove, said casing having a downwardly presented air ingress opening along the forward side thereof, the lower wall of said casing extending rearwardly at a downward inclination from said ingress opening, said lower wall provided with a laterally extending, upwardly bulged portion conforming in shape to a portion of a hollow cylinder; means to operatively connect an oven vent pipe to the lower portion of said casing at a point spaced rearwardly from said bulged portion and an electrically driven fan mounted on the upper side of said upwardly bulged portion for drawing air through said opening and vent pipe and discharging the same through said flue.

EDWARD D. LENKE. 

